[PATCH] usb: typec: Prevent setting invalid opmode value

[Sriharsha Allenki]

Setting opmode to invalid values would lead to a
paging fault failure when there is an access to the
power_operation_mode.

Prevent this by checking the validity of the value
that the opmode is being set.

Cc: <stable@xxxxxxxxxxxxxxx>
Fixes: fab9288428ec ("usb: USB Type-C connector class")
Signed-off-by: Sriharsha Allenki <sallenki@xxxxxxxxxxxxxx>
---
 drivers/usb/typec/class.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c
index 35eec70..63efe16 100644
--- a/drivers/usb/typec/class.c
+++ b/drivers/usb/typec/class.c
@@ -1427,7 +1427,8 @@ void typec_set_pwr_opmode(struct typec_port *port,
 {
 	struct device *partner_dev;
 
-	if (port->pwr_opmode == opmode)
+	if ((port->pwr_opmode == opmode) || (opmode < TYPEC_PWR_MODE_USB) ||
+						(opmode > TYPEC_PWR_MODE_PD))
 		return;
 
 	port->pwr_opmode = opmode;
-- 
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